PDF Care of the Patient with Conjunctivitis (Clinical Practice ...
OPTOMETRIC CLINICAL PRACTICE GUIDELINE
Care of the Patient with
Conjunctivitis
OPTOMETRY: THE PRIMARY EYE CARE PROFESSION
Doctors of optometry are independent primary health care providers who examine, diagnose, treat, and manage diseases and disorders of the visual system, the eye, and associated structures as well as diagnose related systemic conditions.
Optometrists provide more than two-thirds of the primary eye care services in the United States. They are more widely distributed geographically than other eye care providers and are readily accessible for the delivery of eye and vision care services. There are approximately 32,000 full-time equivalent doctors of optometry currently in practice in the United States. Optometrists practice in more than 7,000 communities across the United States, serving as the sole primary eye care provider in more than 4,300 communities.
The mission of the profession of optometry is to fulfill the vision and eye care needs of the public through clinical care, research, and education, all of which enhance the quality of life.
OPTOMETRIC CLINICAL PRACTICE GUIDELINE
CARE OF THE PATIENT WITH CONJUNCTIVITIS
Reference Guide for Clinicians
First Edition Originally Prepared by (and Second Edition Reviewed by) the American Optometric Association Consensus Panel on Care of the Patient with Conjunctivitis:
Christopher J. Quinn, O.D., Principal Author Dennis E. Mathews, O.D. Richard F. Noyes, O.D. Gary E. Oliver, O.D. J. James Thimons, Jr., O.D. Randall K. Thomas, O.D.
Reviewed by the AOA Clinical Guidelines Coordinating Committee:
John C. Townsend, O.D., Chair (2nd Edition) John F. Amos, O.D., M.S. (1st and 2nd Edition) Barry Barresi, O.D., Ph.D. (1st Edition) Kerry L. Beebe, O.D. (1st Edition) Jerry Cavallerano, O.D., Ph.D. (1st Edition) John Lahr, O.D. (1st Edition) W. Howard McAlister, O.D., M.P.H. (2nd Edition) Stephen C. Miller, O.D. (2nd Edition) David Mills, O.D. (1st Edition)
Approved by the AOA Board of Trustees June 22, 1995 (1st Edition) and November 8, 2002 (2nd Edition)
Second printing February 1996
? AMERICAN OPTOMETRIC ASSOCIATION 1995, 2002 243 N. Lindbergh Blvd., St. Louis, MO 63141-7881
Printed in U.S.A.
NOTE: Clinicians should not rely on the Clinical Guideline alone for patient care and management. Refer to the listed references and other sources for a more detailed analysis and discussion of research and patient care information. The information in the Guideline is current as of the date of publication. It will be reviewed periodically and revised as needed.
Conjunctivitis iii
TABLE OF CONTENTS
INTRODUCTION ........................................................................................... 1
I. STATEMENT OF THE PROBLEM .................................................... 3 A. Description and Classification of Conjunctivitis........................... 3 1. Allergic Conjunctivitis ...................................................... 3 a. Atopic Keratoconjunctivitis .................................. 4 b. Simple Allergic Conjunctivitis............................... 4 c. Seasonal Conjunctivitis .......................................... 4 d. Vernal Conjunctivitis ............................................. 4 e. Giant Papillary Conjunctivitis................................ 5 2. Bacterial Conjunctivitis ..................................................... 5 a. Hyperacute Bacterial Conjunctivitis ...................... 5 b. Acute Bacterial Conjunctivitis ............................... 5 c. Chronic Bacterial Conjunctivitis ............................ 6 3. Viral Conjunctivitis ........................................................... 6 a. Adenoviral Conjunctivitis ...................................... 6 b. Herpetic Conjunctivitis .......................................... 6 4. Chlamydial Conjunctivitis ................................................. 7 5. Other Forms of Conjunctivitis ........................................... 7 a. Contact Lens-Related Conjunctivitis...................... 7 b. Mechanical Conjunctivitis...................................... 8 c. Traumatic Conjunctivitis........................................ 8 d. Toxic Conjunctivitis............................................... 8 e. Neonatal Conjunctivitis.......................................... 8 f. Parinaud Oculoglandular Syndrome ...................... 9 g. Phlyctenular Conjunctivitis .................................... 9 h. Secondary Conjunctivitis ....................................... 9 B. Epidemiology of Conjunctivitis .................................................... 9 1. Prevalence and Incidence .................................................. 9 2. Risk Factors ..................................................................... 10 C. Clinical Background of Conjunctivitis........................................ 10 1. Natural History ................................................................ 10 2. Common Signs, Symptoms, and Complications.............. 10 a. Allergic Conjunctivitis ......................................... 11 b. Bacterial Conjunctivitis........................................ 11 c. Viral Conjunctivitis.............................................. 12 d. Chlamydial Conjunctivitis.................................... 13 e. Other Forms of Conjunctivitis.............................. 16 3. Early Detection and Prevention ....................................... 18
II. CARE PROCESS ................................................................................. 21 A. Diagnosis of Conjunctivitis......................................................... 21
iv Conjunctivitis
1. Patient History ................................................................. 21 2. Ocular Examination......................................................... 23
a. Visual Acuity ....................................................... 23 b. Neuro-Ophthalmic Screening............................... 23 c. External Examination........................................... 23 d. Biomicroscopy ..................................................... 24 e. Tonometry............................................................ 25 f. Fundus Examination............................................. 26 3. Supplemental Testing ...................................................... 26 a. Cultures, Smears, and Scrapings .......................... 26 b. Immunoassay ....................................................... 26 c. Conjunctival Biopsy............................................. 27 B. Management of Conjunctivitis.................................................... 27 1. Basis for Treatment ......................................................... 27 2. Available Treatment Options........................................... 27 a. Allergic Conjunctivitis ......................................... 27 b. Bacterial Conjunctivitis........................................ 32 c. Viral Conjunctivitis.............................................. 34 d. Chlamydial Conjunctivitis.................................... 35 e. Contact Lens-Related Conjunctivitis.................... 35 f. Mechanical Conjunctivitis.................................... 36 g. Traumatic Conjunctivitis...................................... 36 h. Toxic Conjunctivitis............................................. 36 i. Neonatal Conjunctivitis........................................ 37 j. Parinaud Oculoglandular Syndrome .................... 38 k. Phlyctenular Conjunctivitis .................................. 38 l. Secondary Conjunctivitis ..................................... 38 3. Patient Education............................................................. 38 4. Prognosis and Follow-up ................................................. 39
CONCLUSION ......................................................................................... 41 III. REFERENCES ..................................................................................... 42
IV. APPENDIX ......................................................................................... 51 Figure 1: Optometric Management of the Patient with Conjunctivitis: A Brief Flowchart ............................................................ 51 Figure 2: Procedures for Obtaining Conjunctival Cultures, Smears, and Scrapings................................................................... 52 Figure 3: Frequency and Composition of Evaluation and Management Visits for Conjunctivitis ............................. 53 Figure 4: ICD-9-CM Classification of Conjunctivitis ..................... 55 Abbreviations of Commonly Used Terms .............................................. 59 Glossary ......................................................................................... 60
Introduction 1
INTRODUCTION
Optometrists, through their clinical education, training, experience, and broad geographic distribution, have the means to provide primary eye and vision care services for a significant portion of the American public and are often the first health care practitioners to examine and diagnose patients with conjunctivitis.
This Optometric Clinical Practice Guideline for the Care of the Patient with Conjunctivitis describes appropriate examination and treatment procedures for patients with conjunctivitis. It contains recommendations for timely diagnosis and treatment, and when consultation with other health care providers may be indicated. This Guideline will assist optometrists in achieving the following goals:
? Identify patients at risk of developing conjunctivitis ? Accurately diagnose conjunctivitis of diverse origins ? Improve the quality of care rendered to patients with conjunctivitis ? Initiate appropriate treatment for conjunctivitis ? Reduce the potentially adverse effects of conjunctivitis ? Inform and educate patients and other health care providers about
the diagnosis, treatment, and management of conjunctivitis.
Statement of the Problem 3
I. STATEMENT OF THE PROBLEM
Conjunctivitis is a nonspecific term used to describe an inflammation of the conjunctiva, which can be caused by a wide range of conditions. It is commonly referred to as "red eye" or "pink eye." Conjunctivitis may result from primary involvement of the conjunctival tissue or may occur secondary to other ocular or systemic conditions that produce conjunctival inflammation. Conjunctivitis is treated almost exclusively on an outpatient basis. However, infants with neonatal conjunctivitis (ophthalmia neonatorum) are generally treated as inpatients.
Although the socioeconomic cost of conjunctivitis has not been estimated, due to its relatively common occurrence, the cost may be substantial. The need for professional diagnosis and treatment, the cost of pharmaceutical intervention, lost productivity in the workplace, and loss of educational opportunity for school-age children are all factors contributing to the socioeconomic impact of conjunctivitis. Accurate diagnosis and appropriate treatment can minimize these costs and the patient's suffering. Misdiagnosis of conjunctivitis can add a substantial cost burden and may result in serious impairment of vision.
A. Description and Classification of Conjunctivitis
Conjunctivitis is an inflammation of the conjunctiva. It is most commonly characterized by conjunctival hyperemia and ocular discharge. Conjunctivitis can be classified clinically according to the underlying cause. (See Appendix Figure 4 for the ICD-9-CM classification of conjunctivitis.)
1. Allergic Conjunctivitis
The conjunctiva, which has a rich vascular supply, abundant immune mediators, and direct exposure to the environment, is often involved in immune-mediated and allergic reactions. The various effects of these reactions are responsible for the signs and symptoms present in patients with allergic conjunctivitis. The major categories of allergic conjunctivitis involve type 1 hypersensitivity reactions in which the allergen reacts with IgE antibodies, stimulating mast cell degranulation and the release of
4 Conjunctivitis
preformed inflammatory mediators.1 The types of allergic conjunctivitis include atopic keratoconjunctivitis, simple allergic conjunctivitis, seasonal or perennial conjunctivitis, vernal conjunctivitis, and giant papillary conjunctivitis.
a. Atopic Keratoconjunctivitis
A severe, chronic external ocular inflammation associated with atopic dermatitis,2 atopic keratoconjunctivitis (AKC) may appear late in the teenage years and continue for 4-5 decades, at which time the disease may resolve spontaneously.3
b. Simple Allergic Conjunctivitis
Occurring as the result of exposure to a wide variety of allergens, simple allergic conjunctivitis often results from exposure to eye medications or contact lens solutions (or their preservatives).
c. Seasonal Conjunctivitis
Examples of simple allergic conjunctivitis include both seasonal and perennial conjunctivitis. These are recurrent, usually transient, and selflimiting conditions due to seasonal exposure to ragweed, pollens, dander, dust, or mold spores.
d. Vernal Conjunctivitis
Vernal conjunctivitis is a severe conjunctival inflammation that can have corneal complications. The majority of affected patients are males under the age of 20 years.4 The average duration of vernal conjunctivitis is 4 years, and most patients tend to "outgrow" the condition by age 30.5 The disease is more common in dry, warm climates. In more temperate climates, vernal conjunctivitis tends to be seasonal, with symptoms increasing in the spring and decreasing in the fall.6
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